216700742544 has 160 divisors (see below), whose sum is σ = 658811833344. Its totient is φ = 60511203840.

The previous prime is 216700742497. The next prime is 216700742549. The reversal of 216700742544 is 445247007612.

It is a junction number, because it is equal to n+sod(n) for n = 216700742496 and 216700742505.

It is not an unprimeable number, because it can be changed into a prime (216700742549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4002277 + ... + 4056059.

Almost surely, 2^216700742544 is an apocalyptic number.

216700742544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216700742544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329405916672).

216700742544 is an abundant number, since it is smaller than the sum of its proper divisors (442111090800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216700742544 is a wasteful number, since it uses less digits than its factorization.

216700742544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54405 (or 54399 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 216700742544 in words is "two hundred sixteen billion, seven hundred million, seven hundred forty-two thousand, five hundred forty-four".